How severe is CVE-2016-1344?

CVE-2016-1344 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-1344 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1344?

CVE-2016-1344 primarily affects Cisco Ios Xe. In total, 108 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1344?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-1344 published?

CVE-2016-1344 was published on 2016-03-26 and last updated on 2026-06-17.

CVE-2016-1344

CVE-2016-1344 is a medium-severity vulnerability in Cisco Ios Xe with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 7.1
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Ios Xe
Published: 2016-03-26
Last modified: 2026-06-17

Description

The IKEv2 implementation in Cisco IOS 15.0 through 15.6 and IOS XE 3.3 through 3.17 allows remote attackers to cause a denial of service (device reload) via fragmented packets, aka Bug ID CSCux38417.

Frequently asked questions

What is CVE-2016-1344?: The IKEv2 implementation in Cisco IOS 15.0 through 15.6 and IOS XE 3.3 through 3.17 allows remote attackers to cause a denial of service (device reload) via fragmented packets, aka Bug ID CSCux38417.
How severe is CVE-2016-1344?: CVE-2016-1344 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-1344 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1344?: CVE-2016-1344 primarily affects Cisco Ios Xe. In total, 108 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1344?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-1344 published?: CVE-2016-1344 was published on 2016-03-26 and last updated on 2026-06-17.

References

Affected products (108)

cpe:2.3:o:cisco:ios_xe:3.3s_3.3.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3s_3.3.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3s_3.3.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3sg_3.3.0sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3sg_3.3.1sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3sg_3.3.2sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3xo_3.3.0xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3xo_3.3.1xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.3xo_3.3.2xo:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4s_3.4.0as:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4s_3.4.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4s_3.4.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4s_3.4.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4s_3.4.3s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4s_3.4.4s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4s_3.4.5s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4s_3.4.6s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4sg_3.4.0sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4sg_3.4.1sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4sg_3.4.2sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4sg_3.4.3sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4sg_3.4.4sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4sg_3.4.5sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4sg_3.4.6sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.4sg_3.4.7sg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5e_3.5.0e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5e_3.5.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5e_3.5.2e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5e_3.5.3e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5s_3.5.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5s_3.5.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.5s_3.5.2s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.0e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.1e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.2ae:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.2e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6e_3.6.3e:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6s_3.6.0s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6s_3.6.1s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xe:3.6s_3.6.2s:*:*:*:*:*:*:*

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